Ebola was discovered in 1976 near the Ebola River in the Democratic Republic of the Congo. Since then, several small outbreaks have occurred in Africa. The 2014 outbreak is the largest. Countries affected in this recent outbreak include:

Guinea

Liberia

Sierra Leone

Ebola was previously reported in:

Nigeria

Senegal

Spain

United States

Mali

United Kingdom

There are no current cases of Ebola in these countries. Most of these cases were due to people traveling from a country where Ebola was present.

There were 4 people diagnosed with Ebola in the United States. Two were imported cases, and two contracted the disease after caring for an Ebola patient in the United States. One man died from the disease. The other three recovered and are now free of Ebola.

HOW EBOLA CAN SPREAD

Ebola does not spread as easily as more common illnesses such as colds, the flu, or measles. There is NO evidence that the virus that causes Ebola is spread through the air or water. A person who has Ebola CANNOT spread the disease until symptoms appear.

Ebola can ONLY spread between humans by direct contact with infected body fluids including but not limited to urine, saliva, sweat, feces, vomit, breast milk, and semen. The virus can enter the body through a break in the skin or through mucous membranes, including the eyes, nose, and mouth.

Ebola can also spread by contact with ANY surfaces, objects, and materials that have been in contact with body fluids from a sick person, such as:

Bedclothes and bedding

Clothing

Bandages

Needles and syringes

Medical equipment

In Africa, Ebola may also be spread by:

Handling infected wild animals hunted for food (bushmeat)

Contact with blood or body fluids of infected animals

Contact with infected bats

Ebola does NOT spread through:

Air

Water

Food

Insects (mosquitoes)

Health care workers and people caring for sick relatives are most at risk for developing Ebola because they are more likely to come in to direct contact with body fluids.

Symptoms:

The time between exposure and when symptoms occur (incubation period) is 2 to 21 days. On average, symptoms develop in 8 to 10 days.

Early symptoms of Ebola include:

Fever greater than 101.5°F (38.6°C)

Chills

Severe headache

Sore throat

Muscle pain

Weakness

Fatigue

Rash

Abdominal (stomach) pain

Diarrhea

Vomiting

Late symptoms include:

Bleeding from the mouth and rectum

Bleeding from eyes, ears, and nose

Organ failure

A person who does not have symptoms 21 days after being exposed to Ebola will not develop the disease.

Treatment:

There is no known cure for Ebola. Experimental treatments have been used, but none have been fully tested to see if they work well and are safe.

People with Ebola must be treated in a hospital. There, they can be isolated so the disease cannot spread. Health care providers will treat the symptoms of the disease.

Treatment for Ebola includes:

Fluids given through a vein (IV)

Oxygen

Blood pressure management

Treatment for other infections

Blood transfusions

Survival depends on how a person's immune system responds to the virus. A person also may be more likely to survive if they receive good medical care.

People who survive Ebola are immune from the virus for 10 years or more. They can no longer spread Ebola. However, men who survive can carry the Ebola virus in their sperm for as long as 3 months. They should abstain from sex or use condoms for 3 months.

Long-term complications can include joint and vision problems.

When to Contact a Medical Professional:

Call your health care provider if you have traveled to West Africa and:

Know you have been exposed to Ebola

You develop symptoms of the disorder, including fever

Getting treatment right away may improve the chances of survival.

Prevention:

There is no vaccine to protect against Ebola. The CDC urges all United States residents to avoid travel to Liberia, Guinea, and Sierra Leone because of unprecedented outbreaks of Ebola in those countries.

If you plan to travel to one of the countries where Ebola is present, the CDC recommends taking the following steps to prevent illness:

Practice careful hygiene. Wash your hands with soap and water or an alcohol-based hand sanitizer. Avoid contact with blood and body fluids.

Avoid contact with people who have a fever, are vomiting, or appear ill.

Do not handle items that may have come in contact with an infected person's blood or body fluids. This includes clothes, bedding, needles, and medical equipment.

Avoid funeral or burial rituals that require handling the body of someone who has died from Ebola.

Avoid contact with bats and nonhuman primates or blood, fluids, and raw meat prepared from these animals.

Avoid hospitals in West Africa where Ebola patients are being treated. If you need medical care, the United States embassy or consulate is often able to provide advice about facilities.

After you return, pay attention to your health for 21 days. Seek medical care right away if you develop symptoms of Ebola, such as a fever. Tell the health care providers that you have been to a country where Ebola is present.

Health care workers who may be exposed to people with Ebola should follow these steps:

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